JP2010156559A - Tape measure case braking structure - Google Patents
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- JP2010156559A JP2010156559A JP2008333599A JP2008333599A JP2010156559A JP 2010156559 A JP2010156559 A JP 2010156559A JP 2008333599 A JP2008333599 A JP 2008333599A JP 2008333599 A JP2008333599 A JP 2008333599A JP 2010156559 A JP2010156559 A JP 2010156559A
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Abstract
Description
本発明は、巻尺ケースの制動構造の改良に関する。 The present invention relates to an improvement in a braking structure for a tape measure case.
一般に、金属製の巻尺テープを側面円形状であって合成樹脂製等のケース内に収納できる、いわゆる「密閉型」の巻尺が広く使用されている。
このような密閉型の巻尺にあっては、金属製のテープを引き出した場合には、引き出されるテープに所定の重量があることから、テープ自体の慣性力によって巻尺テープが巻装されているドラムが回ってしまい巻尺テープがケースから大量に出てしまう場合や、巻尺テープがケース内に広がってケース内周面部に巻尺テープが張り付いてしまい、ドラムが空転してしまうことからテープをなかなか引き出せない場合がある。
In general, a so-called “sealed” tape measure is widely used in which a metal tape measure tape has a circular shape on the side and can be stored in a case made of synthetic resin or the like.
In such a sealed tape measure, when a metal tape is pulled out, the drawn tape has a predetermined weight, so that the drum on which the tape measure tape is wound by the inertia force of the tape itself. If a tape measure tape comes out of the case in large quantities, or the tape measure spreads in the case and the tape measure tape sticks to the inner peripheral surface of the case, causing the drum to idle, making it easy to pull out the tape. There may not be.
このような密閉型の巻尺の一例を示すと、図8(1)に示すように、巻尺80aは、合成樹脂製であって、所定の厚さ寸法を有する円盤状に形成されたケース81と、上記ケース81の中央部に形成された軸部82に回転可能に装着され、一側面部に形成された開口部83に配置され、テープが巻装される合成樹脂製のドラム84とを備えている。 An example of such a sealed tape measure is as shown in FIG. 8 (1). A tape measure 80a is made of synthetic resin and has a case 81 formed in a disk shape having a predetermined thickness. A synthetic resin drum 84 that is rotatably mounted on a shaft portion 82 formed in the center portion of the case 81 and is disposed in an opening 83 formed in one side surface portion, and on which a tape is wound. ing.
そして、上記軸部82の基端部には板バネ85が内装され、板バネ85の付勢力によりドラム84を上記軸部82の反基端部側のケース内側周面部86に圧接させるか、又は、図8(2)に示すように、ドラム84と上記ケース内側周面部86との間に金属製のリング部材87を配置することによりドラム84の回転に対する制動力を得るようにした巻尺80bがあった。 Then, a leaf spring 85 is built in the base end portion of the shaft portion 82, and the drum 84 is pressed against the case inner peripheral surface portion 86 on the opposite base end side of the shaft portion 82 by the urging force of the leaf spring 85, or Alternatively, as shown in FIG. 8 (2), a tape measure 80 b that obtains a braking force against the rotation of the drum 84 by disposing a metal ring member 87 between the drum 84 and the case inner peripheral surface portion 86. was there.
しかしながら、このように構成された巻尺80a,80bにあっては、常時、ドラム84の回転に対する制動力が作用することから、テープを引き出す場合に、引き出すために所定の力が必要とされるためテープを引き出しにくく、また、上記板バネ85や上記リング部材87が必要となることから部品点数が増加すると共に、製作コストが嵩む、という不具合があった。 However, in the tape measure 80a, 80b configured as described above, since a braking force against the rotation of the drum 84 is always applied, a predetermined force is required to pull out the tape when the tape is pulled out. Since the tape is difficult to pull out and the leaf spring 85 and the ring member 87 are required, the number of parts increases and the manufacturing cost increases.
このような不具合を解消するために、図9(1)及び図9(2)に示すように、本件特許出願人によって、従来、上記ドラム84が摺接する上記ケース内側面部と対向するドラム84の基端部88に斜板カム従動部89を設けると共に、軸部82の周囲に、上記斜板カム従動部89に対向して配置される斜板カム部90を設け、上記ドラム84がテープを開放する方向へ回転する場合には
図9(2)に示すように、上記斜板カム従動部89が斜板カム部90の登り方向へ回転動して上記ドラム84の開口側周縁部91が上記ケースの内側周面部86に圧接して制動力を発生すると共に、上記ドラム84がテープを巻き取る方向へ回転する場合には、図9(1)に示すように、上記斜板カム部90の降り方向へ回転動して上記ドラム84の開口側周縁部91が上記ケースの内側周面部86から離間して制動力が解消されるように構成された巻尺の制動構造が提案されている(特許文献1)。
In order to solve such a problem, as shown in FIGS. 9 (1) and 9 (2), the applicant of the present patent application has conventionally used a drum 84 facing the inner surface of the case where the drum 84 is in sliding contact. A swash plate cam follower 89 is provided at the base end portion 88, and a swash plate cam portion 90 is provided around the shaft portion 82 so as to face the swash plate cam follower 89. When rotating in the opening direction, as shown in FIG. 9 (2), the swash plate cam follower 89 rotates in the ascending direction of the swash plate cam portion 90, and the opening side peripheral portion 91 of the drum 84 is moved. When the drum 84 is pressed against the inner peripheral surface 86 of the case to generate a braking force and the drum 84 rotates in the direction of winding the tape, as shown in FIG. The drum 84 is opened by rotating in the descending direction. A tape measure braking structure has been proposed in which the side peripheral edge portion 91 is separated from the inner peripheral surface portion 86 of the case so as to eliminate the braking force (Patent Document 1).
しかしながら、このような従来の巻尺の制動構造にあっては、上記ドラム84の回転により斜板カム従動部89が上記斜板カム部90の登り方向へ回転動し上記ドラム84の開口側周縁部91が上記ケースの内側周面部86に圧接する際には、上記ドラム84の開口側周縁部91の全周縁部が上記ケース内側周面部86に圧接することとなる。
その結果、図10に示すように、作業者がテープを引き出している際に、ドラム84の周縁部全体がケース81の内側周縁部86に圧接し、その結果、突然に大きな制動力が発生してテープを引き出している手に大きなショックが伝わることから、余り使いやすくない、という不具合があった。
However, in such a conventional tape measure braking structure, the rotation of the drum 84 causes the swash plate cam follower 89 to rotate in the ascending direction of the swash plate cam portion 90, thereby opening the peripheral edge portion of the drum 84. When 91 is in pressure contact with the inner peripheral surface portion 86 of the case, the entire peripheral edge portion of the opening side peripheral edge portion 91 of the drum 84 is in pressure contact with the case inner peripheral surface portion 86.
As a result, as shown in FIG. 10, when the operator pulls out the tape, the entire peripheral edge of the drum 84 is pressed against the inner peripheral edge 86 of the case 81, and as a result, a large braking force is suddenly generated. There was a problem that it was not easy to use because a big shock was transmitted to the hand pulling out the tape.
このような事情は、特に、小型の巻尺の場合に顕著であり、小型の巻尺にあってはテープの長さも短い(20m〜30m)ことから非常に大きな制動力が瞬時に発生し、制動が効きすぎ、却ってテープを引き出しにくい、という不具合があった。 Such a situation is particularly noticeable in the case of a small tape measure. In the case of a small tape measure, the tape length is short (20 m to 30 m), so a very large braking force is instantaneously generated and braking is not performed. There was a problem that it was too effective and it was difficult to pull out the tape.
また、上記ドラム84の開口側周縁部89と上記ケース内側周面部86とが、設計誤差又は取り付け誤差等により面部全体が均一に当接しないような場合には、僅かな誤差であっても、双方の面部が均一に当接しない場合には、結果的に、余り大きな制動力を発揮することができない。
従って、製造誤差又は取り付け誤差により製品個々によって大きな制動力を奏する場合とそうではない場合とが生じ、製品間でのばらつきが発生する場合があった。
Further, when the opening side peripheral edge portion 89 of the drum 84 and the case inner peripheral surface portion 86 do not contact the entire surface portion uniformly due to a design error or an attachment error, even a slight error may occur. If the two surface portions do not contact uniformly, as a result, a too large braking force cannot be exhibited.
Therefore, there are cases where a large braking force is produced depending on individual products due to manufacturing errors or attachment errors, and cases where such a case is not the case, and variations among products may occur.
そこで本願発明は、小型の巻尺であっても適度な制動力を得ることができると共に、製品間において制動力のばらつきがなく、テープを引き出しやすい巻尺の制動構造を提供することにある。 Accordingly, the present invention is to provide a braking structure having a tape measure in which a moderate braking force can be obtained even with a small tape measure, and there is no variation in the braking force between products, and the tape can be easily pulled out.
上記課題解決のため、請求項1記載の発明にあっては、巻き取られた巻尺テープを収納する巻尺ケースと、上記巻尺ケース内に厚さ方向に沿って突設された軸部に回転可能に装着され、上記巻尺テープが巻装されるドラムとを備え、上記テープが巻尺ケースから引き出される際に、上記ドラムを上記巻尺ケースの内側面部に圧接させて制動力を得るように構成された巻尺ケースの制動構造において、上記ドラムの周縁部を部分的に巻尺ケースの内側面部に圧接させることを特徴とする。
従って、上記ドラムを上記巻尺ケースの内側面部に圧接させて制動力を得る場合であっても、上記ドラムの全周縁部が巻尺ケースの内側面部に圧接するという事態はない。
In order to solve the above-mentioned problem, in the invention according to claim 1, the tape can be rotated by a tape measure case for storing the wound tape measure tape, and a shaft portion protruding in the thickness direction in the tape measure case. And a drum around which the tape measure tape is wound, and when the tape is pulled out of the tape measure case, the drum is pressed against the inner side surface of the tape measure case to obtain a braking force. In the braking structure of the tape measure case, the peripheral portion of the drum is partially brought into pressure contact with the inner side surface portion of the tape measure case.
Therefore, even when the drum is brought into pressure contact with the inner side surface of the tape measure case to obtain a braking force, there is no situation in which the entire peripheral edge portion of the drum is in pressure contact with the inner side surface portion of the tape measure case.
請求項2記載の発明にあっては、上記巻尺ケースは内部に巻尺テープを収納しうる厚さ寸法を有する全体円盤状に形成されると共に、上記ドラムの周縁部には上記巻尺ケースの内側面部に圧接しうる制動部が互いに間隔を置いて設けられていることを特徴とする。 According to a second aspect of the present invention, the tape measure case is formed in an overall disk shape having a thickness dimension capable of accommodating a tape measure tape, and an inner side surface portion of the tape measure case is provided at a peripheral portion of the drum. Brake parts that can be pressed against each other are provided at intervals.
請求項3記載の発明にあっては、上記制動部は、巻尺ケース内側面部に対して弾性的に圧接しうるように構成されていることを特徴とする。
請求項4記載の発明にあっては、上記巻尺ケースは、厚さ方向の一側面部には円形開口部を有し、上記ドラムは、上記円形開口部に配置される本体部と、上記本体部に連設され、上記テープが巻装される巻取り部とを有し、上記本体部の周縁には上記開口部の内方周縁部に圧接しうる制動部が設けられていることを特徴とする。
The invention according to claim 3 is characterized in that the braking portion is configured to be elastically pressed against the inner side surface portion of the tape measure case.
According to a fourth aspect of the present invention, the tape measure case has a circular opening on one side surface in the thickness direction, and the drum has a main body disposed in the circular opening and the main body. And a winding portion around which the tape is wound, and a brake portion capable of being in pressure contact with an inner peripheral edge portion of the opening portion is provided on a peripheral edge of the main body portion. And
請求項5記載の発明にあっては、上記制動部は、上記本体部の周縁に所定間隔をおいて複数形成された基部と、上記基部から軸方向に突出形成された突部とを有することを特徴とする。
請求項6記載の発明にあっては、上記基部は、上記ドラムの外周面部に固定された脚部と、上記脚部から上記外周面部から離間して配置され、上記突部が形成された支持部とを備えていることを特徴とする。
In the invention according to claim 5, the braking portion has a base portion formed in plural at a predetermined interval around the periphery of the main body portion, and a protrusion portion that protrudes in the axial direction from the base portion. It is characterized by.
According to a sixth aspect of the present invention, the base portion includes a leg portion fixed to the outer peripheral surface portion of the drum, and a support in which the protruding portion is formed by being spaced apart from the outer peripheral surface portion from the leg portion. And a portion.
請求項7記載の発明にあっては、上記基部は平面コ字状に形成され、支持部の両端に設けられた一対の脚部を有し、上記突部は上記支持部の長さ方向中央部に形成され、ドラムの軸方向に沿って、上記支持部の弾性変形により可撓するように構成されていることを特徴とする。 In the invention according to claim 7, the base portion is formed in a plane U shape, and has a pair of legs provided at both ends of the support portion, and the protrusion is the center in the length direction of the support portion. It is formed in a part, and it is comprised so that it may be flexible by the elastic deformation of the said support part along the axial direction of a drum.
請求項1及び2記載の発明にあっては、従来のように、上記ドラムを上記巻尺ケースの内側面部に圧接させて制動力を得る場合であっても、上記ドラムの全周縁部が巻尺ケースの内側面部に圧接しないことから、瞬時に大きな制動力が作用し、使用者の手に負担を掛け、取り扱いにくいという事態を防止することができる。 In the first and second aspects of the invention, even when the drum is pressed against the inner side surface of the tape measure case to obtain a braking force as in the prior art, the entire peripheral edge of the drum is the tape measure case. Since it is not pressed against the inner side surface portion, it is possible to prevent a situation in which a large braking force acts instantaneously, places a burden on the user's hand, and is difficult to handle.
その結果、小型の巻尺の場合であってテープの長さが短い場合であっても、非常に大きな制動力が瞬時に発生し、制動が効きすぎ、却ってテープを引き出しにくい、という不具合を解消することができる。 As a result, even if it is a small tape measure and the length of the tape is short, a very large braking force is generated instantaneously, the braking is too effective, and it is difficult to pull out the tape on the contrary. be able to.
また、請求項3〜7記載の発明にあっては、上記制動部は、巻尺ケース内側面部に対して弾性的に圧接しうるように構成されていることから、請求項1及び2記載の発明の効果に加えて、より円滑に制動部が巻尺ケース内側面部に当接することができ、除々に摩擦力を発生させることができる。また、巻尺ケース側やドラム側に製造誤差や取り付け誤差があり、本来想定する当接状態に反する事態があった場合であっても、容易に上記の誤差を吸収することができ、従来のような製造誤差又は取り付け誤差により、発生する制動力に相違がある、という事態を有効に回避することができる。 In the inventions according to claims 3 to 7, since the braking part is configured to be able to elastically press against the inner side surface part of the tape measure case, the inventions according to claims 1 and 2 are provided. In addition to the above effect, the braking portion can more smoothly abut against the inner side surface portion of the tape measure case, and a frictional force can be gradually generated. Moreover, even if there is a manufacturing error or mounting error on the tape measure case side or the drum side and there is a situation contrary to the originally assumed contact state, the above error can be easily absorbed, It is possible to effectively avoid a situation in which there is a difference in the generated braking force due to various manufacturing errors or mounting errors.
本発明に係る巻尺ケースの制動構造を、図面に基づき詳細に説明する。
本形態に係る巻尺ケースの制動構造が適用される巻尺10は、図1及び図2に示すように、内部に巻き取られた金属製の巻尺テープ11を収納する、所定の厚さ寸法を有し全体略円盤状に形成さ.れた合成樹脂製の巻尺ケース12からなる。
A brake structure for a tape measure case according to the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, the tape measure 10 to which the braking structure of the tape measure case according to the present embodiment is applied has a predetermined thickness dimension for accommodating the metal tape measure tape 11 wound inside. And a tape measure case 12 made of a synthetic resin formed in a substantially disk shape.
図2に示すように、この巻尺ケース12は、上記巻尺ケース12内に厚さ方向に沿って突設された軸部13に回転可能に装着され、上記巻尺テープ11が巻装される合成樹脂製のドラム14を備えている。
上記巻尺ケース12は、厚さ方向の一側面部には円形開口部15を有してお
り、上記ドラム14は合成樹脂による一体成型であって、上記円形開口部15
に配置される本体部16と、上記本体部16に連設され、上記テープ11が巻
装される巻取り部17とを有している。
As shown in FIG. 2, the tape measure case 12 is rotatably mounted on a shaft portion 13 projecting in the thickness direction in the tape measure case 12 and the synthetic tape on which the tape measure tape 11 is wound. A drum 14 made of steel is provided.
The tape measure case 12 has a circular opening 15 on one side surface in the thickness direction, and the drum 14 is integrally formed of synthetic resin, and the circular opening 15
A main body portion 16 disposed on the main body portion 16 and a winding portion 17 connected to the main body portion 16 and around which the tape 11 is wound.
そして、上記ドラム14の基端部23には斜板カム従動部24が設けられて
いると共に、巻尺ケース12側には、軸部13の周囲に、上記斜板カム従動部24に対向して配置される斜板カム部25が設けられている。
従って、上記ドラム14が巻尺テープ11を開放する方向へ回転する場合には上記斜板カム従動部24が斜板カム部25の登り方向へ回転動して上記ドラム14の開口側周縁部26が上記ケース内側面部27に圧接して制動力を発生し、また、上記ドラム14が巻尺テープ11を巻き取る方向へ回転する場合には上記斜板カム部25の降り方向へ回転動して上記ドラム14の開口側周縁部26が上記ケース内側面部27から離間して上記制動力が解消されるように構成されている。
A swash plate cam follower 24 is provided at the base end portion 23 of the drum 14, and on the tape measure case 12 side, around the shaft portion 13, facing the swash plate cam follower 24. A swash plate cam portion 25 is provided.
Therefore, when the drum 14 rotates in the direction to open the tape measure 11, the swash plate cam follower 24 rotates in the ascending direction of the swash plate cam 25, and the opening side peripheral portion 26 of the drum 14 is moved. When the drum 14 rotates in the direction in which the tape tape 11 is taken up, the drum 14 is rotated in the descending direction of the swash plate cam portion 25 when the drum 14 rotates in the direction of winding the tape tape 11. 14 opening side peripheral edge portions 26 are separated from the case inner side surface portion 27 so that the braking force is eliminated.
そして、図2〜図5に示すように、上記本体部16の周縁には上記円形開口部15の内方周縁部19に圧接しうる制動部18が設けられている。
上記円形開口部15は、本実施の形態にあっては、上記巻尺ケース12の厚さ方向一側面部17の略全域に亘って形成されており、上記円形開口部15の周縁には、上記ドラム14の本体部16の制動部18が当接する内方周縁部19が形成されると共に、上記内方周縁部19から略直角に連設され、上記制動部18の側面部20が摺接する平面円形状の突条部28が全周に亘って形成されている。
As shown in FIGS. 2 to 5, a brake portion 18 that can be pressed against the inner peripheral edge portion 19 of the circular opening 15 is provided on the peripheral edge of the main body portion 16.
In the present embodiment, the circular opening 15 is formed over substantially the entire area of one side surface portion 17 in the thickness direction of the measuring tape case 12, An inner peripheral edge portion 19 with which the brake portion 18 of the main body portion 16 of the drum 14 abuts is formed, and is a plane that is provided at a substantially right angle from the inner peripheral edge portion 19 and in which the side surface portion 20 of the brake portion 18 is in sliding contact. A circular protrusion 28 is formed over the entire circumference.
図3に示すように、本実施の形態にあっては、上記制動部18は、上記本体部16の周縁部に、互いに所定間隔を置いて8個形成されている。上記制動部18は、図2〜図4に示すように、全体側面略コ字状に形成され、上記本体部16の周縁に所定間隔をおいて複数形成された基部21と、上記基部21から軸方向(本体部16の厚さ方向)に突出形成された突部22とを有している。 As shown in FIG. 3, in the present embodiment, eight braking portions 18 are formed on the peripheral portion of the main body portion 16 at a predetermined interval. As shown in FIGS. 2 to 4, the braking portion 18 is formed in a substantially U shape on the entire side surface, and a plurality of base portions 21 formed at predetermined intervals around the periphery of the main body portion 16, and the base portion 21. And a protrusion 22 formed to protrude in the axial direction (thickness direction of the main body 16).
上記基部21は、上記ドラムの外周面部31に固定された一対の脚部29,29と、上記一対の脚部29,29の間に形成され、上記外周面部31から離間して配置され、上記突部22が形成された支持部30とを備えている。
上記一対の脚部29,29は、夫々、略直方体形状に形成され、上記支持部30は、上記脚部29,29の上端部において掛け渡されるようにして設けられている。基部21は、上記本体部16の曲率と同一の曲率に形成されている。
The base portion 21 is formed between a pair of leg portions 29, 29 fixed to the outer peripheral surface portion 31 of the drum, and the pair of leg portions 29, 29, and is disposed apart from the outer peripheral surface portion 31. And a support portion 30 on which a protrusion 22 is formed.
The pair of leg portions 29 and 29 are each formed in a substantially rectangular parallelepiped shape, and the support portion 30 is provided so as to be spanned at the upper end portions of the leg portions 29 and 29. The base 21 is formed with the same curvature as that of the main body 16.
上記突部22は上記支持部30の長さ方向中央部において、支持部30の幅寸法と同一の幅寸法であって上記支持部30の1/3の長さ寸法の略直方体形状に形成され、上面部が当接面部32として形成されている。 The protrusion 22 is formed in a substantially rectangular parallelepiped shape having a width dimension equal to the width dimension of the support section 30 and a length dimension of 1/3 of the support section 30 at the center in the length direction of the support section 30. The upper surface portion is formed as the contact surface portion 32.
以下に、本実施の形態に係る巻尺ケースの制動構造の作用について説明する。
図1に示すように、本実施の形態に係る巻尺ケース10から金属製の巻尺テープ11を先端部のリング部材31を介して引き出した場合には、ドラム14に固定された上記斜板カム従動部24が巻尺ケース12側に設けられた斜板カム部25の登り方向へ回転動することにより、斜板カム従動部24がドラム14を軸方向に沿って円形開口部15側へ押すこととなり、その結果、上記制動部18は巻尺ケース12の内方周縁部19へ圧接する。
Below, the effect | action of the braking structure of the tape measure case which concerns on this Embodiment is demonstrated.
As shown in FIG. 1, when the metal tape measure tape 11 is pulled out from the tape measure case 10 according to the present embodiment through the ring member 31 at the tip, the swash plate cam follower fixed to the drum 14. As the portion 24 rotates in the ascending direction of the swash plate cam portion 25 provided on the tape measure case 12 side, the swash plate cam driven portion 24 pushes the drum 14 toward the circular opening portion 15 along the axial direction. As a result, the braking portion 18 is pressed against the inner peripheral edge portion 19 of the tape measure case 12.
この場合、図6(1)及び(2)に示すように、上記制動部18を構成する突部22の当接面部32が上記内方周縁部19へ摺接し始め、その後、さらに上記斜板カム従動部24によって内方周縁部19方向へ押しつけられる場合には、上記突部22は上記支持部30の厚さ方向に沿って押されることとなる。この場合、図6(3)に示すように、支持部30は一対の脚部29,29の間に掛け渡されるように一体形成されていることから、上記支持部30はドラム14の軸方向に沿って弾性変形して撓む。 In this case, as shown in FIGS. 6 (1) and 6 (2), the abutment surface portion 32 of the protrusion 22 constituting the braking portion 18 starts to slidably contact the inner peripheral edge portion 19, and then further the swash plate. When the cam follower 24 is pressed toward the inner peripheral edge 19, the protrusion 22 is pressed along the thickness direction of the support 30. In this case, as shown in FIG. 6 (3), since the support portion 30 is integrally formed so as to be spanned between the pair of leg portions 29, 29, the support portion 30 is in the axial direction of the drum 14. It is elastically deformed and bent.
その結果、この支持部30の弾性変形により、上記斜板カム従動部24による内方周縁部19への圧接力は吸収されることから、従来におけるように、ドラム14の周縁部全体が内方周縁部全体に剛的に圧接する場合とは異なり、発生する摩擦力を柔軟に低減することができる。 As a result, the elastic deformation of the support portion 30 absorbs the pressure contact force applied to the inner peripheral edge portion 19 by the swash plate cam driven portion 24, so that the entire peripheral edge portion of the drum 14 is inward as in the prior art. Unlike the case where the entire periphery is pressed firmly, the generated frictional force can be flexibly reduced.
その結果、図6(1)〜(3)及び図7に示すように、非接触の状態から上記突部22が内側周縁部19に圧接し始め、さらに完全に押し付けられることになるが、上記のように圧接力を上記支持部30の弾性変形により吸収するため、摩擦力を除々に発生させることができる。
その結果、本実施の形態に係る巻尺ケースの制動構造にあっては、従来のようなドラム14の周縁部全体がケースの内側周縁部全体に圧接するように構成された場合とは異なり、制動部18を構成する突起部22のみがケースの内側周縁部19に圧接するように構成されていることから、ドラム14のケースの内側周縁部19への当接面積が減少するため、発生する摩擦力を従来よりも低減することができる。
As a result, as shown in FIGS. 6 (1) to (3) and FIG. 7, the protrusion 22 starts to come into pressure contact with the inner peripheral edge 19 from a non-contact state and is further pressed completely. Since the pressure contact force is absorbed by the elastic deformation of the support portion 30 as described above, the frictional force can be gradually generated.
As a result, in the braking structure for the tape measure case according to the present embodiment, unlike the conventional case where the entire peripheral edge of the drum 14 is configured to press-contact the entire inner peripheral edge of the case, the braking is performed. Since only the protrusion 22 constituting the portion 18 is configured to be in pressure contact with the inner peripheral edge 19 of the case, the contact area of the drum 14 with the inner peripheral edge 19 of the case is reduced, so that the generated friction The force can be reduced as compared with the conventional case.
さらに、上記のように制動部18を構成する突部22が形成された支持部30が一対の脚部29,29の間に形成され、内側周縁部19へ突部22が圧接する際には軸部13の軸方向に沿って弾性変形して撓むように構成されていることから、適宜、発生する過剰な摩擦力を吸収しながら制動力を発生させることができ、従来のような、巻尺テープ11を引き出した場合に、突然に大きな制動力が発生する、という事態を防止することができる。 Further, when the support portion 30 on which the protrusion 22 constituting the braking portion 18 is formed is formed between the pair of leg portions 29 and 29 as described above, when the protrusion 22 presses against the inner peripheral edge portion 19. Since it is configured to be elastically deformed and bent along the axial direction of the shaft portion 13, it is possible to generate a braking force while appropriately absorbing excessive frictional force, and a conventional tape measure tape. When 11 is pulled out, a situation in which a large braking force is suddenly generated can be prevented.
その結果、使用者が巻尺テープ11を引き出す際に、手に突然に衝撃を与えることのない、使いやすい巻尺を提供することができる。
また、本実施の形態に係る巻尺ケースの制動構造にあっては、上記制動部18は、上記本体部16の周縁部に、互いに所定間隔を置いて8個形成され、上記制動部18は、図2〜5に示すように、全体略コ字状に形成され、上記本体部16の周縁に所定間隔をおいて複数形成された基部21と、上記基部21から軸方向(本体部16の厚さ方向)に突出形成された突部22とを有するように構成されていることから、巻尺テープ11の長さによって巻尺テープ11の重量が異なり、引き出した場合に巻尺テープ11に作用する慣性力も異なるが、巻尺テープ11の長さに応じて、例えば、突部22の大きさ、突部22の当接面部32の表面積、及び上記突部22が形成された支持部30の幅寸法、および材質を適宜変更することにより、突部22が巻尺ケース12の内側周面部19に圧接した場合の弾性力を調節することができ、最も適切な制動力を有する巻尺を作製することができる。その結果、製品の種類に応じた適切な制動力を有する多種類の巻尺を提供することができる。
As a result, it is possible to provide an easy-to-use tape measure that does not suddenly give an impact to the hand when the user pulls out the tape measure tape 11.
Further, in the braking structure for the tape measure case according to the present embodiment, eight braking portions 18 are formed at a predetermined interval on the peripheral portion of the main body portion 16, and the braking portions 18 are As shown in FIGS. 2 to 5, the base 21 is formed in a substantially U-shape as a whole and is formed at a predetermined interval around the periphery of the main body 16, and the base 21 has an axial direction (the thickness of the main body 16. Since the weight of the tape measure tape 11 varies depending on the length of the tape measure tape 11 and the inertial force acting on the tape measure tape 11 when it is pulled out is also configured. Although different, depending on the length of the tape measure 11, for example, the size of the protrusion 22, the surface area of the contact surface 32 of the protrusion 22, and the width dimension of the support 30 on which the protrusion 22 is formed, and Protrusion by changing the material as appropriate 2 it is possible to adjust the elastic force when pressed against the inner peripheral surface 19 of the tape measure case 12, it can be manufactured tape measure with the most appropriate braking force. As a result, it is possible to provide various types of tape measure having appropriate braking force according to the type of product.
なお、上記実施の形態にあっては、制動部18が全体として8個設けられている場合を例に説明したが、制動部18の個数に関しては上記実施の形態に限定されない。また、制動部18の具体的構造に関しても上記実施の形態に限定されない。 In the above embodiment, the case where eight braking portions 18 are provided as a whole has been described as an example, but the number of braking portions 18 is not limited to the above embodiment. Further, the specific structure of the braking portion 18 is not limited to the above embodiment.
また、本実施の形態にあっては、巻尺テープ11が金属製の場合を例に説明したが、上記実施の形態に限定されず、合成樹脂製の巻尺テープからなる巻尺に関しても適用することができる。 Moreover, in this Embodiment, although the case where the tape measure tape 11 was metal was demonstrated to the example, it is not limited to the said embodiment, It can apply also regarding the tape measure which consists of a synthetic resin tape measure tape. it can.
本発明は、広く、密閉型の巻尺のケースに適用することができる。 The present invention is widely applicable to a case of a sealed tape measure.
10 巻尺
11 巻尺テープ
12 巻尺ケース
13 軸部
14 ドラム
15 円形開口部
16 本体部
17 巻き取り部
18 制動部
19 内方周縁部
20 側面部
21 基部
22 突部
23 基端部
24 斜板カム従動部
25 斜板カム部
26 開口側周縁部
27 ケース内側面部
28 突条部
29 脚部
30 支持部
31 外周面部
80 巻尺
81 ケース
82 軸部
83 開口部
84 ドラム
85 板バネ
86 内側周面部
87 リング部材
88 基端部
89 斜板カム従動部
90 斜板カム部
91 開口周縁部
DESCRIPTION OF SYMBOLS 10 Tape measure 11 Tape measure tape 12 Tape measure case 13 Shaft part 14 Drum 15 Circular opening part 16 Main-body part 17 Winding part 18 Braking part 19 Inner peripheral edge part 20 Side part 21 Base part 22 Projection part 23 Base end part 24 Swash plate cam follower part 25 Swash plate cam portion 26 Opening side peripheral portion 27 Case inner side surface portion 28 Projection portion 29 Leg portion 30 Support portion 31 Outer peripheral surface portion 80 Tape measure 81 Case 82 Shaft portion 83 Opening portion 84 Drum 85 Plate spring 86 Inner peripheral surface portion 87 Ring member 88 Base end portion 89 Swash plate cam driven portion 90 Swash plate cam portion 91 Opening peripheral edge portion
Claims (7)
上記ドラムの周縁部を部分的に巻尺ケースの内側面部に圧接させることを特徴とする巻尺ケースの制動構造。 A tape measure case that houses the wound tape measure tape, and a drum that is rotatably mounted on a shaft projecting along the thickness direction in the tape measure case, and on which the tape measure tape is wound, In the braking structure of the tape measure case configured to obtain a braking force by pressing the drum against the inner side surface of the tape measure case when the tape is pulled out from the tape measure case,
A braking structure for a tape measure case, wherein the peripheral portion of the drum is partially brought into pressure contact with an inner side surface portion of the tape measure case.
上記基部から軸方向に突出形成された突部とを有することを特徴とする請求項4記載の巻尺ケースの制動構造。 The braking portion includes a plurality of base portions formed at predetermined intervals on the periphery of the main body portion;
5. A braking structure for a tape measure case according to claim 4, further comprising: a protrusion that protrudes in the axial direction from the base.
上記突部は上記支持部の長さ方向中央部に形成され、ドラムの軸方向に沿って、上記支持部の弾性変形により可撓するように構成されていることを特徴とする請求項6記載の巻尺ケースの制動構造。 The base is formed in a substantially U-shaped plane, the legs are provided in a pair, and the support is provided between the pair of legs,
The said protrusion is formed in the center part of the length direction of the said support part, and it is comprised so that it may be flexible by the elastic deformation of the said support part along the axial direction of a drum. Braking structure for the tape measure case.
Priority Applications (1)
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JP2008333599A JP2010156559A (en) | 2008-12-26 | 2008-12-26 | Tape measure case braking structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2008333599A JP2010156559A (en) | 2008-12-26 | 2008-12-26 | Tape measure case braking structure |
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JP2010156559A true JP2010156559A (en) | 2010-07-15 |
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JP2008333599A Pending JP2010156559A (en) | 2008-12-26 | 2008-12-26 | Tape measure case braking structure |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09170901A (en) * | 1995-12-21 | 1997-06-30 | Tajima Tool:Kk | Cased tape measure with improved operability |
JPH09229701A (en) * | 1996-02-23 | 1997-09-05 | Japan Radio Co Ltd | Position detection method |
JPH09287901A (en) * | 1996-04-22 | 1997-11-04 | Yamayo Sokuteiki Kk | Tape measure |
JP2007171130A (en) * | 2005-12-26 | 2007-07-05 | Yamayo Sokuteiki Kk | Tape measure |
-
2008
- 2008-12-26 JP JP2008333599A patent/JP2010156559A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09170901A (en) * | 1995-12-21 | 1997-06-30 | Tajima Tool:Kk | Cased tape measure with improved operability |
JPH09229701A (en) * | 1996-02-23 | 1997-09-05 | Japan Radio Co Ltd | Position detection method |
JPH09287901A (en) * | 1996-04-22 | 1997-11-04 | Yamayo Sokuteiki Kk | Tape measure |
JP2007171130A (en) * | 2005-12-26 | 2007-07-05 | Yamayo Sokuteiki Kk | Tape measure |
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